Use After Free Affecting kernel-tools package, versions *
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Test your applications- Snyk ID SNYK-RHEL8-KERNELTOOLS-7324794
- published 21 Jun 2024
- disclosed 20 Jun 2024
Introduced: 20 Jun 2024
CVE-2022-48735 Open this link in a new tabHow to fix?
There is no fixed version for RHEL:8 kernel-tools.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-tools package and not the kernel-tools package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
ALSA: hda: Fix UAF of leds class devs at unbinding
The LED class devices that are created by HD-audio codec drivers are registered via devm_led_classdev_register() and associated with the HD-audio codec device. Unfortunately, it turned out that the devres release doesn't work for this case; namely, since the codec resource release happens before the devm call chain, it triggers a NULL dereference or a UAF for a stale set_brightness_delay callback.
For fixing the bug, this patch changes the LED class device register and unregister in a manual manner without devres, keeping the instances in hda_gen_spec.
References
- https://access.redhat.com/security/cve/CVE-2022-48735
- https://git.kernel.org/stable/c/0e629052f013eeb61494d4df2f1f647c2a9aef47
- https://git.kernel.org/stable/c/549f8ffc7b2f7561bea7f90930b6c5104318e87b
- https://git.kernel.org/stable/c/813e9f3e06d22e29872d4fd51b54992d89cf66c8
- https://git.kernel.org/stable/c/a7de1002135cf94367748ffc695a29812d7633b5